As notification of state changes are received at an observer (at the arrowhead), the observer, acting as an observable, can decide which of its own observers it will notify further.
一个观察者对象接收到了状态更改的通知(箭头所指的方向),然后,该观察者本身也作为被观察目标,它然后决定在下一步通知哪些它自身的观察者。
The API method performs the operation on the application state as requested in the input parameters received from the external client.
API方法将按照从外部客户端接收的输入参数中请求的方式对应用程序状态执行相关操作。
This function handles the various communication state changes, such as when the call starts, when a connection is established, and when the response has been received.
此函数会处理各种通信状态更改(如调用启动时、建立连接时和接收到响应时)。
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